Eyelet Lace Inset Tunic Coverup

i normally wear a large, but got a medium and its pretty loose. I decided i didnt think this was appropriate for Cabo bc it was going to be pretty hot, mainly because the material is too thick for it to be a coverup. its not see through, not even a little bit. just looks like a short tunic dress. I didnt even pack it in my suitcase as a back up. tried to return it and nordstrom rack wouldnt take it back bc it was one day over. like literally hours over the return deadline and they wouldnt budge. I didnt buy anything from them for 6 months I was so mad. imagine the profit loss.